USB-AO-ARB1: 8MHz 16-bit Analog Waveform Output USB Board

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  • High-Speed USB 2.0 Device (USB 3.0+ Compatible)
  • High-Retention USB Connector
  • Fast Waveform Output; Up to 8M Samples/Sec
  • Small, Portable Digital to Analog Single-Ended Output at 16-Bit Resolution
  • 16K Sample FIFO Buffer On-Board
  • Jumper Selectable Analog Output Ranges of:
    0-2.5V, 0-5V, 0-10V, ±2.5V, ±5V, ±10V
  • Two 4-Bit I/O Ports Independently Selectable for Inputs or Outputs
  • All 8 DIO Lines Buffered with Sink 32mA / Source 32mA Current Capabilities
  • Jumper Selectable 10KΩ Pull-Up/Pull-Down Resistors on DIO Lines
  • Standard 16-Pin IDC Connector for DIO and Gate
  • BNC Connectors for DAC Output and Gate Control
  • PC/104 Module Size and Mounting Compatibility
  • Alternate Embedded USB Connector
  • Small, Rugged, Industrial Enclosure


  • Board only, without enclosure, features PC/104 module size and mounting compatibility
  • Extended Temperature (-40°C to 85°C)
  • +5VDC regulated AC/DC supply and onboard DC-power input jack
  • Screw terminals installed for DC-power input (no jack, no wall-wart)
  • Replace +5VDC digital logic with +3.3V I/O
  • Support for Wind River VxWorks (call for ordering information)
Last updated on November 3, 2023, 9:09 am


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The USB-AO-ARB1 is an ideal solution for adding portable, easy-to-install high-speed analog output capabilities to any computer with a USB 2.0 port. The USB-AO-ARB1 is a USB 2.0 High-Speed device and is plug-and-play allowing quick connect or disconnect whenever you need additional I/O on your USB port.

The USB-AO-ARB1 features 1 single-ended analog output on a standard female BNC connector, at up to 8MHz of continuous transfers through a 32 kByte (16kSample) on-board FIFO. A programmable frequency source allows configurable output rates from 1K through more than 8MHz. A jumper-selected analog output range of 0-2.5V, 0-5V, 0-10V, ±2.5V, ±5V, or ±10V ensures broad application compatibility. The analog output is enabled/gated by a signal applied to either a pin on the IDC or the second BNC.

In addition to the analog output, there are 8 digital I/O channels configurable as 2 4-bit ports for input or output (see block diagram). The digital I/O wiring connections are via a standard, 0.1″ spacing, 2×8 pin, male, shrouded, keyed connector.

All required power is normally supplied to the board via the USB cable. For higher current sourcing capabilities external power may be used. The USB-AO-ARB1 is designed to be used in rugged industrial environments but is small enough to fit nicely onto any desk or testing station. The board itself is PC/104 sized (3.550 by 3.775 inches) and ships inside a steel powder-coated enclosure with an anti-skid bottom.

OEM USB/104 Form Factor

The OEM (board only) version is perfect for a variety of embedded applications. What makes the OEM option unique is that its PCB size and pre-drilled mounting holes match the PC/104 form factor (without the bus connections). This ensures easy installation using standard standoffs inside most enclosures or systems. The board can be added to any PC/104, PCI-104, or PCI/104-Express stack by connecting it to a USB 2.0 port usually included on-board with embedded CPU form factors. This is especially important since many newer CPU chipsets do not support ISA and have plenty of USB ports. The USB-AO-ARB1 OEM board can also be installed using standoffs inside other enclosures or systems. For embedded OEM type applications, an additional miniature USB input header is provided in parallel with the type B connector.

Special Order

Please contact ACCES with your precise requirement. Examples of special orders would be conformal coating, custom software, and more. We will work with you to provide exactly what is required.

High Retention USB Connector

The ever-growing presence of USB in the industrial/military marketplace has driven the need for USB connections to be reliable, dependable, and unfailing. Gone are the days of loose USB connections. A type B USB connector is used on all ACCES USB/104 products which features a high retention design that complies with the class 1, Div II minimum withdrawal requirement of over 3 pounds of force (15 Newtons). This connector has an orange color-coded insulator to quickly differentiate it from standard USB connectors. Using these USB connectors increases reliability in your system and ensures a tight connection. For embedded OEM type applications, an additional miniature USB input header is provided in parallel with the type B connector.


  • Testing and Debugging
  • Laboratory Automation
  • Manufacturing Test
  • Image Capture
  • Process Monitoring
  • Datasource Emulation
  • Embedded OEM


Available accessories include a variety of cables and screw terminal boards for quick and easy connectivity.

Need more isolation?Isolate your I/O with our USB-ISOLATOR accessory! Tru-Iso™ signal isolation up to 4kV meets EN60601 standards in a rugged industrial-grade, extended temp (-40 to +85°C) package — no connection to power needed! Use with our 1-foot USB cable and avoid tangles. OEM-version available, featuring picoblade microfit headers for hassle-free embedded cabling.SoftwareThe USB-AO-ARB1 utilizes a high-speed custom function driver optimized for maximum continuous data throughput of 16 MB/s that is hundreds to thousands of times faster than the USB human interface device (HID) driver used by many competing products. This approach maximizes the full functionality of the hardware along with capitalizing on the advantage of high-speed USB 2.0. The boards are supported for use in most USB supported operating systems and includes a free Windows and Linux compatible software package. This package contains sample programs and source code in C# (.NET), Delphi, and Visual C++, for Windows. Third party support includes a Windows standard DLL interface usable from the most popular application programs and includes example LabVIEW VIs. Embedded OS support includes XP Embedded and Windows Embedded Standard.


Data Sheets



Drivers and Downloads

Full list of available Downloads: Software Packages, Drivers, Manuals, and other documents

Information about our Free Software packages:

ACCES is proud to provide a full suite of software support with every Data Acquisition product. We are committed to supporting the most popular operating systems and platforms for our customers. Currently we are actively supporting XP -> 10, both 32 & 64 bit, including “Server 2008,” “Embedded,” and “Compact” flavors for all plug-and-play products including PCI, PCI Express, USB, and more. Many products continue to ship with support for additional operating systems such as DOS, Windows 95, 98, Me, NT4, and 2000.


Among the software we deliver with our products are sample programs in a wide variety of programming languages. These samples are used to demonstrate the software interfaces to our products — and many can be used as-is in your production environments, or to test functionality of the devices out-of-the-box. We’re currently actively supporting sample programs in Microsoft Visual C#, Visual Basic, Delphi, and Visual C/C++, with many devices including samples in Borland C/C++ 3.1 for DOS. Additionally we provide National Instruments LabVIEW compatible DLLs and many demonstration VIs for our devices.


Drivers for various operating systems are also provided, including active support for Windows XP -> 10 — all in both 32-bit and 64-bit flavors, and including consumer, server, and embedded varieties — as well as the 2.6 and newer Linux kernels and recent OSX / macOS versions. Many products continue to ship with driver support for Windows 95, 98, Me, NT4, and Windows 2000, but support for these operating systems is considered deprecated.

Setup Programs and Utilites

Our Data Acquisition devices also include a graphical setup utility that walks you through the process of configuring any option jumpers or switches on the device, as well as explaining a little about the various connectors present.

Many devices also include utility programs – little tools to make your use of the device easier, such as EWriter, a program that allows you to read and write data in the user-accessible EEPROM locations on all our USB data acquisitition products; or WinRISC, a “Really Incredibly Simple Communications” terminal program that lets you get started instantly with serial devices.

“Register Level” Documentation

Besides all this software in all these languages and operating systems ACCES has a policy of open and transparent development: none of our lowest-level “register” interfaces are hidden from you — we document every register in every bus card, every command in every serial board, and every usb control transfer in every USB Data Acquisition board. These lowest-level interfaces allow you to develop for our products in ANY operating system or language, regardless of our actively supporting it or having a driver for it. We have customers actively developing in ADA, Android, Python, Java, MATLAB, Solaris, and more, just by referring to our complete low-level interface documentation! And we provide the full source code to all of our drivers, regardless of operating system, to give you an even bigger head start in your own development tasks.

No Fees or Royalties

All of this software is provided at no additional charge, and is licensed under any of a variety of flexible — and royalty free — options. Check out our software license explanation if you’d like more information.

USB and Performance

Our USB Data Acquisition products use our “AIOUSB” driver package in Windows and Linux. This driver package includes 32-bit and 64-bit support, and consists of low-level driver components and a high-level API library. This custom interface driver enables our USB devices to achieve 4000 transactions per second, compared to the competitions’ “HID” drivers that cap out around 50 transactions per second. You can read all about the API in the USB Software Reference Manual linked below, and included in every applicable Software Package. (The Linux version of the AIOUSB API is almost identical to the Windows API, and is documented in the aiousb.html file included in the Linux software package.) Like all of our software, full source code is always provided.

Custom Software

ACCES also offers Custom Software Services for our products. Our prices are unbelievably low, often as inexpensive as free! If you need something tweaked to support your needs, or an entire enterprise application developed from scratch, it is definitely worth your time to inquire with us, first.

Further information about available ACCES Software:

Redistributing Windows Drivers
A list of ACCES drivers and the files that compose them under different versions of Windows, so you can easily redistribute ACCES cards and drivers.


ACCES has successfully partnered with Wind River to bring our entire line of USB DAQ boards to VxWorks 7!

Our newly available driver and easy-to-use API-library, including full source and sample code, supports ReNumeration for loading firmware across the USB cable as well as our GenericVendorWrite and GenericVendorRead functions, compatible with our Windows AIOUSB.dll API. Additional AIOUSB API functions are being ported, ask for details!

With our aioUSB.VxWorks library USB DAQ can now be used with the utmost confidence for real-world/real-time/rugged applications. Using VxWorks 7 as the solid foundation, and positive-retention cables in either micro-fit or USB-B-with-screw, as well as rugged steel enclosures and DIN-Rail or PC/104-mounting options, USB is no longer “just for desktops”.

You can find more information about our VxWorks libraries and services on our Wind River Silver Partner page.

PC Interface

USB USB 2.0 or 3.0+, High-Speed

Analog Output Interface

Output Connector BNC, female
Analog Output 1, Single-Ended
Resolution 16-bit
Unipolar Ranges 2.5V, 5V, 10V
Bipolar Ranges ±2.5V, ±5V, ±10V
Waveform Output Rate 1kHz to 8MHz via onboard oscillator
Relative Accuracy ±4 LSB, typical
Differential Non-Linearity ±2 LSB, typical
Settling Time 70ns, typical
Output Current ±6mA
Waveform Features 16k Sample FIFO (32k Bytes), GATE input, Onboard intelligence

Digital Input / Output Interface

I/O Connector Right-angle IDC 16-pin (0.1″) boxed and keyed header
Gate Connector BNC, female; also on IDC pin 16

Digital Outputs

5V Logic

High-output Voltage 3.8VDC, min
Low-output Voltage 0.55VDC max
Sink Current 32mA
Source Current 32mA

3.3V Logic

High-output Voltage 2.4VDC, min
Low-output Voltage 0.55VDC max
Sink Current 24mA
Source Current 24mA

Digital Inputs

5V Logic

High-input Voltage 3.5VDC min, 5.5VDC max
Low-input Voltage 1.5VDC max, -0.5VDC min

3.3V Logic

High-input Voltage 2.0VDC min, 5.5VDC max
Low-input Voltage 0.8VDC max, -0.5VDC min


Size 3.550 x 3.775 inches (PC/104-size)
Enclosure Size 3.9 x 4.075 x 1 inches
Weight 75.5 grams

ModelDescriptionPrice (USD)

USB-AO-ARB1: 8MHz 16-bit Analog Waveform Output USB Board

UTBK-16 Direct connect 16-pin screw terminal board $29
CAB-BNC-6 Standard 6-foot co-axial cable, male BNC connectors $89.00
CAB-BNC-CLIP 3-foot co-axial BNC to minigrabber test clip cable $19
MP104-DIN DIN rail mounting provision
USB-104-HUB Rugged, industrial grade, 4-port high-speed USB 2.0 hub
Options (call for pricing)
-OEM Board only, without enclosure, features PC/104 module size and mounting compatibility
-PR External power components and AC/DC adapter
-ST Screw terminals installed for DC-power input (no jack, no wall-wart)
-LV Replaces +5VDC digital logic with +3.3V I/O
-T Extended Operating Temperature (-40°C to +85°C)